I'm also an so, 4, & ENFP too, just not sure whether I'm so/sp or so/sx, haha! Anyway, welcome to PerC; enjoy your time here!
Oh, okay! I think I might settle just on so until I learn more about it (I'm veeeery new to IVs).I’m not 100% sure either, but I believe I was a so/sx when I was younger and have now settled on a so/sp stacking (probably also due to my bf’s calming influence). I don’t challenge others on a regular basis to prove (mostly to myself) my superiority like I used to do, and only occasionally slip back into it.
It’s awesome to meet like-minded people!